<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>首页</title>
    <style>
        *{
            padding: 0;
            margin: 0;
        }
        body{
            background-image: url("img/bg_imagae.jpg");
        }
        .bd{
            width: 1000px;
            height: 717px;
            background-color: rgba(255,255,255,0.6);
            margin: 0 auto;
        }
        #nav{
            width: 100%;
            height: 59px;
            border-bottom: 1px #fff solid;
        }
        #list{
            width: 100%;
            height: 100%;
            margin: 0 auto;
        }
        #list li{
            list-style: none;
            padding-left: 140px;
            padding-top: 10px;
            float: left;
        }
        #list li a{
            width: 150px;
            height: 40px;
            border: 1px #666 solid;
            border-radius: 25px;
            text-decoration: none;
            display: block;
            text-align: center;
            line-height: 40px;
            color: #333;
        }
        #list li a:hover{
            background-color: rgba(255,255,255,0.5);
        }
        .left{
            width: 249px;
            height: 600px;
            float: left;
            border-right: 1px #fff solid ;
        }
        .right{
            width: 750px;
            height: 600px;
            float: left;
        }
        .left li{
            width: 150px;
            height: 34px;
            padding-left: 19px;
            line-height: 34px;
            list-style: none;
            margin: 40px 40px;
            border-bottom: 1px #666 solid;
        }
        .left li:hover{
            background-color: rgba(255,255,255,0.7);
        }
        .right li{
            width: 600px;
            height: 34px;
            padding-left: 19px;
            line-height: 34px;
            list-style: none;
            margin: 40px 50px;
            border-bottom: 1px #666 solid;
        }
        .right li:hover{
            background-color: rgba(255,255,255,0.7);
        }

        .footer{
            width: 100%;
            height: 56px;
            clear: both;
            border-top: 1px #fff solid;
            text-align: center;
            line-height: 56px;
            font-size: 18px;
        }
    </style>
</head>
<body>
    <div class="bd">
        <div id="nav">
            <ul id="list">
                <li><a href="javascript:;">排行榜</a> </li>
                <li><a href="javascript:;">做题广场</a> </li>
                <li><a href="javascript:;">个人中心</a></li>
            </ul>
        </div>
        <div class="left">
            <ul>
                <li>第一课</li>
                <li>第二课</li>
                <li>第三课</li>
                <li>第四课</li>
            </ul>
        </div>
        <div class="right">
            <ul>
                <li>第一题</li>
                <li>第二题</li>
                <li>第三题</li>
                <li>第四题</li>
                <li>第五题</li>
                <li>第六题</li>
                <li>第七题</li>
            </ul>
        </div>
        <div class="footer">
            每日标语：你因成功而内心充满喜悦的时候，就没有时间颓废。 —— 弗兰克·迈耶
        </div>
    </div>
</body>
</html>